[PATCH 12/13] clk: renesas: Add R8A77970 SD0H/SD0 clocks for SDHI

[Marek Vasut]

From: Hai Pham <hai.pham.ud at renesas.com>

On R-Car V3M (AKA R8A77970), the SD0CKCR is laid out differently than on
the other R-Car gen3 SoCs. Hence, new clock types are introduced
respectively.

Based on Linux commit 381081ffc294 ("clk: renesas: r8a77970: Add SD0H/SD0
clocks for SDHI") by Sergei Shtylyov <sergei.shtylyov at cogentembedded.com>

Signed-off-by: Hai Pham <hai.pham.ud at renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
Marek: - Fix missing ~ in GENMASK(a, b), use clrsetbits_le32 instead
       - Do not modify r8a77970-cpg-mssr.c much, drop enum r8a77970_clk_types
         which is now part of common clock types in rcar-gen3-cpg.h instead
---
 drivers/clk/renesas/clk-rcar-gen3.c     | 39 +++++++++++++++++++++++++
 drivers/clk/renesas/r8a77970-cpg-mssr.c |  5 ----
 drivers/clk/renesas/rcar-gen3-cpg.h     |  5 ++++
 3 files changed, 44 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/renesas/clk-rcar-gen3.c b/drivers/clk/renesas/clk-rcar-gen3.c
index 53f16dfb1e0..f8a23623223 100644
--- a/drivers/clk/renesas/clk-rcar-gen3.c
+++ b/drivers/clk/renesas/clk-rcar-gen3.c
@@ -57,6 +57,18 @@ static const struct clk_div_table cpg_sd_div_table[] = {
 	{ 0, 2 }, { 1, 4 }, { 0, 0 },
 };
 
+static const struct clk_div_table r8a77970_cpg_sd0h_div_table[] = {
+	{  0,  2 }, {  1,  3 }, {  2,  4 }, {  3,  6 },
+	{  4,  8 }, {  5, 12 }, {  6, 16 }, {  7, 18 },
+	{  8, 24 }, { 10, 36 }, { 11, 48 }, {  0,  0 },
+};
+
+static const struct clk_div_table r8a77970_cpg_sd0_div_table[] = {
+	{  4,  8 }, {  5, 12 }, {  6, 16 }, {  7, 18 },
+	{  8, 24 }, { 10, 36 }, { 11, 48 }, { 12, 10 },
+	{  0,  0 },
+};
+
 static unsigned int rcar_clk_get_table_div(const struct clk_div_table *table,
 					   const u32 value)
 {
@@ -205,6 +217,19 @@ static int gen3_clk_setup_sdif_div(struct clk *clk, ulong rate)
 		debug("%s[%i] SD clk: parent=%i offset=%x div=%u rate=%lu => val=%u\n",
 		      __func__, __LINE__, core->parent, core->offset, div, rate, value);
 		break;
+
+	case CLK_TYPE_R8A77970_SD0:
+		div = gen3_clk_get_rate64(&grandparent) / rate;
+		value = rcar_clk_get_table_val(cpg_sd_div_table, div);
+		if (!value)
+			return -EINVAL;
+
+		clrsetbits_le32(priv->base + core->offset,
+				GENMASK(7, 4), value << 4);
+
+		debug("%s[%i] SD clk: parent=%i offset=%x div=%u rate=%lu => val=%u\n",
+		      __func__, __LINE__, core->parent, core->offset, div, rate, value);
+		break;
 	}
 
 	return 0;
@@ -358,6 +383,13 @@ static u64 gen3_clk_get_rate64(struct clk *clk)
 						     GENMASK(9, 5),
 						     cpg_sdh_div_table, "SDH");
 
+	case CLK_TYPE_R8A77970_SD0H:
+		return rcar_clk_get_rate64_div_table(core->parent,
+						     gen3_clk_get_rate64(&parent),
+						     priv->base + core->offset,
+						     CPG_SDCKCR_SDHFC_MASK,
+						     r8a77970_cpg_sd0h_div_table, "SDH");
+
 	case CLK_TYPE_GEN3_SD:
 		fallthrough;
 	case CLK_TYPE_GEN4_SD:
@@ -367,6 +399,13 @@ static u64 gen3_clk_get_rate64(struct clk *clk)
 						     CPG_SDCKCR_FC_MASK,
 						     cpg_sd_div_table, "SD");
 
+	case CLK_TYPE_R8A77970_SD0:
+		return rcar_clk_get_rate64_div_table(core->parent,
+						     gen3_clk_get_rate64(&parent),
+						     priv->base + core->offset,
+						     CPG_SDCKCR_SD0FC_MASK,
+						     r8a77970_cpg_sd0_div_table, "SD");
+
 	case CLK_TYPE_GEN3_RPCSRC:
 		return rcar_clk_get_rate64_div_table(core->parent,
 						     gen3_clk_get_rate64(&parent),
diff --git a/drivers/clk/renesas/r8a77970-cpg-mssr.c b/drivers/clk/renesas/r8a77970-cpg-mssr.c
index 4d72ec1fae8..f5d77df4233 100644
--- a/drivers/clk/renesas/r8a77970-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a77970-cpg-mssr.c
@@ -22,11 +22,6 @@
 
 #define CPG_SD0CKCR		0x0074
 
-enum r8a77970_clk_types {
-	CLK_TYPE_R8A77970_SD0H = CLK_TYPE_GEN3_SOC_BASE,
-	CLK_TYPE_R8A77970_SD0,
-};
-
 enum clk_ids {
 	/* Core Clock Outputs exported to DT */
 	LAST_DT_CORE_CLK = R8A77970_CLK_OSC,
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.h b/drivers/clk/renesas/rcar-gen3-cpg.h
index 008e8928e59..200e4adb906 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.h
+++ b/drivers/clk/renesas/rcar-gen3-cpg.h
@@ -18,7 +18,9 @@ enum rcar_gen3_clk_types {
 	CLK_TYPE_GEN3_PLL3,
 	CLK_TYPE_GEN3_PLL4,
 	CLK_TYPE_GEN3_SDH,
+	CLK_TYPE_R8A77970_SD0H,
 	CLK_TYPE_GEN3_SD,
+	CLK_TYPE_R8A77970_SD0,
 	CLK_TYPE_GEN3_R,
 	CLK_TYPE_GEN3_MDSEL,	/* Select parent/divider using mode pin */
 	CLK_TYPE_GEN3_Z,
@@ -115,6 +117,9 @@ struct rcar_gen3_cpg_pll_config {
 #define CPG_SDCKCR_STPnCK		BIT(8)
 #define CPG_SDCKCR_SRCFC_MASK		GENMASK(4, 2)
 #define CPG_SDCKCR_FC_MASK		GENMASK(1, 0)
+/* V3M specifics */
+#define CPG_SDCKCR_SDHFC_MASK		GENMASK(11, 8)
+#define CPG_SDCKCR_SD0FC_MASK		GENMASK(7, 4)
 
 #define CPG_RPCCKCR	0x238
 #define CPG_RPCCKCR_DIV_POST_MASK	GENMASK(4, 3)
-- 
2.39.0